Anti-Doping Agency (WADA) on why it banned Armstrong for life in August and released more than 1,000 pages of evidence from its probe of doping in cycling.
This series of photos shows seven file pictures clockwise from upper left taken in 2005, 2004, 2003, 2002, 2001, 2000 and 1999 of US cyclist Lance Armstrong posing on the podium on the Champs-Elysees in Paris after winning the Tour de France cylcing race. AFP photo
"Lance Armstrong did not merely use performance-enhancing drugs. He supplied them to his teammates," the report said. "He was not just a part of the doping culture on his team. He enforced and re-enforced it."
Evidence included testimony from 11 of Armstrong's former US Postal cycling teammates, an expert's finding that Armstrong blood changes indicated doping and documents showing a payment to doping-linked doctor Michele Ferrari. The basics of USADA report on Lance Armstrong
This file photo shows seven-time Tour de France champion Lance Armstrong grimacing during a news conference after the Memorial Hermann Ironman 70.3 Texas triathlon in Galveston, Texas. AP Photo
"The evidence of the US Postal Service Pro Cycling Team-run scheme is overwhelming," USADA chief executive Travis T Tygart said.
"The evidence shows beyond any doubt that the US Postal Service Pro Cycling Team ran the most sophisticated, professionalized and successful doping program that sport has ever seen."
Eyewitness testimony of Armstrong taking EPO and testosterone and having blood transfusions came from such former teammates as Tyler Hamilton and Floyd Landis, admitted dope cheats, and George Hincapie, who confessed on Wednesday that he took performance-enhancing drugs.
Other former Armstrong teammates who testified include Frankie Andreu, Michael Barry, Tom Danielson, Levi Leipheimer, Stephen Swart, Christian Vande Velde, Jonathan Vaughters and David Zabriskie.
Tygart said the program was designed to evade detection as well as pressure athletes into taking drugs and maintain a "code of silence" about activities.
"We hope the sport will use this tragedy to prevent it from ever happening again," Tygart said.
USADA also cites e-mails, scientific data and financial records, included more than $1 million in documented payments from Armstrong to a Swiss company run by Ferrari, who purportedly advised him on doping.
In this photo dated on June 8, 2003 US cyclist Lance Armstrong speaks to the press in Villars-de-Lans, before the start of the first stage of the Criterium du Dauphine Libere cycling event. AFP PHOTO
A medical expert said changes in Armstrong's red blood cell count between samples taken at the 2009 and 2010 Tour de France races and during his earlier run of victories would naturally occur in less than one person in a million. Armstrong used illegal drugs: Ex-teammate
"The evidence in the case is beyond strong," the report said. "It is as strong as or stronger than that presented in any case brought by USADA."
Armstrong was banned for life by USADA and stripped of his seven Tour de France triumphs from 1999-2005 after declining the chance to challenge the doping charges against him before a USADA arbitration panel.
Armstrong, who has denied any wrongdoing, said he was weary of years of allegations against him and tired of fighting, instead hoping to focus on his Livestrong foundation and anti-cancer fundraising activities.
"We weren't about to go through another year like the last two years dealing with the emotional and financial stress on Lance," Armstrong attorney Tim Herman said.
The decision not to press ahead with a defense against the charges and confront the witnesses and evidence against him came after Armstrong lost a legal fight in US court to challenge USADA's system of hearing doping appeals.
"I'm not suggesting that they are all lying, but I am suggesting that each witness needs to have confrontation and cross-examination to test the accuracy of their information," Herman said.
Tygart noted that "Lance Armstrong was given the same opportunity to come forward and be part of the solution. He rejected it."
Herman attacked the credibility of USADA's findings, noting a federal probe ended with no charges filed against Armstrong, although USADA said it received no evidence from that investigation and was not seeking violations of law.
Herman also renewed Armstrong's objections to USADA's appeal system to a US arbitration panel and the Court of Arbitration for Sport (CAS), saying the inability to appeal to the US court system rather than CAS was "diabolical."
"The process is completely rigged. I don't care what Travis Tygart says," Herman said. "Christians dealing with the lions in Rome had a better record than athletes dealing with USADA. It's a rigged system."
The UCI has challenged USADA's authority to bring charges against Armstrong and the sanctions against Armstrong could wind up before CAS.
In this photo dated on July 11, 1999 US cyclist Lance Armstrong rides during the 8th stage of the 86th Tour de France, an individual time-trial in Metz, northern France. AFP PHOTO
Three US Postal team members -- director Johan Bruyneel, doctor Pedro Celaya and trainer Jose Marti -- have chosen to contest the charges and face a public hearing on the matter, likely later this year.
Tygart denied Armstrong's claims of a "witch hunt" against him, saying USADA pressed the case as it would have against any suspected dope cheat.
"We focused solely on finding the truth without being influenced by celebrity or non-celebrity, threats, personal attacks or political pressure because that is what clean athletes deserve and demand," Tygart said.